True Glee Peacock

Old English trēowe, faithful — used as a color modifier since the seventeenth century for hues that read as the canonical version of their family. True red, true blue: the saturation is full, the hue is neither shifted nor adulterated. Sits at the center of the bold and crisp buckets, marking the unequivocal middle of any chromatic family.

Old English glēo, music-or-merriment. As a color modifier, glee implies a singing-and-merry-and-bubbling quality, the visual register of Elizabethan-glee-club-and-madrigal-glee hand-singing-and-merry-and-bubbling Elizabethan-glee-club-and-madrigal-and-catch-singing gleeful-and-singing-and-merry-and-bubbling surfaces under Elizabethan-glee-club-and-madrigal-and-catch-singing parlor-and-tavern-and-court candlelit-music-light. Sits at the modifier-and-mood end of the grid, parallel to mirth and merry in usage.

Pavo cristatus, the Indian peafowl whose male displays the most elaborate sexual ornament in birds — a fan of two-meter eyespotted tail feathers in iridescent blue-green. The color is structural, not pigmented: created by interference patterns in the feather barbules. Peacock blue refers to the dominant body color: a saturated, slightly muted teal-blue with the optical depth of structural color. Cooler than persian, warmer than sapphire.